Roundhouse AI

Agent Mercantile

Get a factual snapshot of supported Aave V3 lending rates and Lido staking APR for Ethereum or Base assets. $0.01 USDC per paid call. No API key or account.

InfraLiveeip155:8453Exactvia cdp
https://api.agentmercantile.com/v1/transaction-gas-preflight
Transaction-gasGas-estimateFee-historyUnsigned-preflightEvm-gas
Calls · 30d
2
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 12 snapshots so far.
$0.55
Verified settled volume
33 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-09-17 03:59Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xdb7b2b54f80479826222749a2ea73a8acc306e1e

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.005USDC≈ $0.005 USD
on Base · exact scheme

Pay 0.005 USDC on Base to 0xdb7b…06e1e. The signed payment is good for 1 minute.

Paid to
0xdb7b…06e1e
USD Coin contract
0x8335…02913
Payment window
1 minute
As published
5000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xdb7b2b54f80479826222749a2ea73a8acc306e1e",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "to": "0x0000000000000000000000000000000000000001",
          "data": "0x",
          "chain": "eip155:8453",
          "value_wei": "0"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "chain": {
            "name": "base",
            "caip2": "eip155:8453",
            "chain_id": 8453
          },
          "status": "OK",
          "machine": "VM06",
          "fee_history": {
            "block_count": 5,
            "newest_block": "latest"
          },
          "limitations": [
            "Point-in-time gas evidence, not a guaranteed final cost or total transaction cost."
          ],
          "gas_estimate": {
            "gas_units": "21000"
          },
          "request_shape": {
            "has_from": false,
            "value_nonzero": false,
            "calldata_bytes": 0
          },
          "methodology_version": "transaction-gas-preflight-0.1.0",
          "illustrative_execution_fees": {
            "kind": "illustrative_execution_fee_observations",
            "covers": "l2_execution_fee_only",
            "recommendation": false,
            "guaranteed_final_cost": false
          }
        }
      },
      "description": "Return bounded factual eth_estimateGas units and recent eth_feeHistory execution-fee evidence for one unsigned Ethereum or Base transaction. Not execution, signing, custody, trading, or a guaranteed final cost. Call when you need point-in-time gas units and recent execution-fee context before signing or submitting."
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "properties": {
            "body": {
              "type": "object",
              "required": [
                "chain",
                "to"
              ],
              "properties": {
                "to": {
                  "type": "string",
                  "pattern": "^0x[0-9a-fA-F]{40}$",
                  "description": "Required 0x-prefixed 20-byte destination. Contract creation is not supported."
                },
                "data": {
                  "type": "string",
                  "pattern": "^0x(?:[0-9a-fA-F]{2})*$",
                  "maxLength": 16386,
                  "description": "Optional 0x-prefixed even-length hex calldata. Default 0x. Maximum 8192 bytes. Request body maximum 20480 bytes."
                },
                "from": {
                  "type": "string",
                  "pattern": "^0x[0-9a-fA-F]{40}$",
                  "description": "Optional 0x-prefixed 20-byte sender used only as an eth_estimateGas field. No ownership is implied."
                },
                "chain": {
                  "enum": [
                    "eip155:1",
                    "eip155:8453"
                  ],
                  "type": "string",
                  "description": "Analysis chain only. Payment remains Base eip155:8453."
                },
                "value_wei": {
                  "type": "string",
                  "pattern": "^(0|[1-9][0-9]*)$",
                  "description": "Optional unsigned base-10 integer string in the uint256 range. Default 0. JSON Schema cannot express the full uint256 upper bound; runtime validation rejects values above 2^256-1."
                }
              },
              "additionalProperties": false
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object",
              "required": [
                "status",
                "machine",
                "methodology_version",
                "chain",
                "gas_estimate",
                "limitations"
              ],
              "properties": {
                "chain": {
                  "type": "object"
                },
                "status": {
                  "enum": [
                    "OK",
                    "PARTIAL",
                    "UNESTIMABLE",
                    "HOLD"
                  ],
                  "type": "string"
                },
                "machine": {
                  "enum": [
                    "VM06"
                  ],
                  "type": "string"
                },
                "fee_history": {
                  "type": [
                    "object",
                    "null"
                  ],
                  "description": "Recent eth_feeHistory execution-fee evidence."
                },
                "limitations": {
                  "type": "array",
                  "items": {
                    "type": "string"
                  }
                },
                "gas_estimate": {
                  "type": [
                    "object",
                    "null"
                  ],
                  "description": "eth_estimateGas units when estimable."
                },
                "request_shape": {
                  "type": "object"
                },
                "methodology_version": {
                  "enum": [
                    "transaction-gas-preflight-0.1.0"
                  ],
                  "type": "string"
                },
                "illustrative_execution_fees": {
                  "type": [
                    "object",
                    "null"
                  ],
                  "description": "Illustrative L2 execution-fee observations, not a guaranteed final cost."
                }
              },
              "additionalProperties": true
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-09-17 03:59Z
Last indexed by Roundhouse
2026-09-25 05:30Z
Last enriched (probe, favicon, geo)
2026-09-12 14:45Z
x402 version
2
Max timeout
60s
Liveness probe
HTTP 404
Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 12 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service Agent Mercantile and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Agent%20Mercantile'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://api.agentmercantile.com/v1/transaction-gas-preflight, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.